Methanol engine

Abstract

A methanol engine belongs to the technical field of automobile engines. The included angle between the center line of the cylinder barrel in the methanol engine cylinder body and the vertical direction is 55 degrees or 63 degrees, the methanol engine body is obliquely arranged, the height of the engine is reduced, the methanol engine can be arranged in a cabin of a light commercial vehicle, the light commercial vehicle can use methanol fuel, and the use cost of the light commercial vehicle is reduced. The positions of the methanol rail assembly and the gasoline rail assembly can be interchanged, the methanol rail assembly is arranged on the intake manifold, the gasoline rail assembly is arranged on the cylinder cover, or the methanol rail assembly is arranged on the cylinder cover, and the gasoline rail assembly is arranged on the intake manifold, so that the engine can use methanol fuel or gasoline fuel for a long time, and the engine is more energy-saving and environment-friendly. And the use area of the vehicle is widened while the use cost of the vehicle is reduced. The methanol engine uses the non-cooling EGR system, so that the cost is reduced, the emission is reduced, and the fuel consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile engines, and in particular relates to a methanol engine. Background Art

[0002] Methanol fuel is cleaner than gasoline and diesel. my country has abundant coal resources, a developed coal chemical industry, and a huge output of coal-to-methanol. The use of methanol fuel is conducive to my country's energy security and reduces its dependence on external energy. At present, the "liquid sunshine" methanol production technology is becoming more and more mature, that is, carbon dioxide plus green hydrogen to produce methanol, which uses electricity generated by renewable energy (photovoltaic, wind power, hydropower, etc.) to produce green hydrogen energy through water electrolysis, and CO2 is reacted with green hydrogen to convert it into liquid methanol that is easy to store and transport, avoiding the intermittent and large-scale consumption problems of renewable energy without involving new carbon dioxide emissions.

[0003] Methanol fuel engine is an engine that uses methanol as fuel. It has the advantages of high efficiency, environmental protection, and safety. It has been widely used in automobiles, ships, aircraft and other fields. With the increasing problems of energy shortage and environmental pollution, the development prospects of methanol fuel engine are becoming more and more broad. First of all, methanol fuel engine has the characteristics of high efficiency, which can effectively utilize fuel energy and improve the efficiency of the engine. Secondly, methanol fuel engine has the advantage of environmental protection. The harmful substances in its emissions are much less than those of traditional fuel engines, which can effectively reduce environmental pollution. In addition, methanol fuel engine also has the advantage of safety. It will not cause dangerous accidents such as fire and explosion, and it is safer and more reliable to use.

[0004] However, methanol engines currently have the following problems:

[0005] 1. At present, there are many models of passenger cars and heavy commercial vehicles that use methanol engines, but there are no models of light commercial vehicles that use methanol engines. Light commercial vehicles generally require inclined engines, and upright engines cannot be arranged in the engine compartment of the whole vehicle. There are many upright methanol engines, but there are no inclined methanol engines.

[0006] 2. Methanol engines generally have a methanol injection system and a gasoline injection system. The two fuel injection systems are generally fixed in position. The methanol rail assembly is arranged in the intake manifold, and the gasoline rail assembly is arranged in the cylinder head; or, the methanol rail assembly is arranged in the cylinder head, and the gasoline rail assembly is arranged in the intake manifold. The different positions of the two injection rails have different effects on the performance of the engine, and the two injection rail positions cannot be interchanged.

[0007] 3. At present, most methanol engines do not have EGR systems, a few have cooled EGR systems, and there are no methanol engines with non-cooled EGR systems, which can reduce alcohol consumption and emissions while reducing costs. Utility Model Content

[0008] In order to solve the problems existing in the prior art, the utility model further provides a methanol engine.

[0009] The technical solution adopted by the utility model is:

[0010] A methanol engine comprises an engine body, a gasoline rail assembly and a methanol rail assembly; the engine body is arranged obliquely, the gasoline rail assembly is connected to the gasoline tank of the whole vehicle and injects gasoline fuel into the combustion chamber of the engine body, and the methanol rail assembly is connected to the methanol tank of the whole vehicle and injects methanol fuel into the combustion chamber of the engine body.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The angle between the center line of the cylinder and the vertical direction in the methanol engine cylinder of the utility model is 55° or 63°. The methanol engine body is arranged tilted to reduce the engine height, so that the methanol engine can be arranged in the cabin of a light commercial vehicle, so that the light commercial vehicle can use methanol fuel, reducing the use cost of the light commercial vehicle.

[0013] 2. The positions of the methanol rail assembly and the gasoline rail assembly of the utility model can be interchanged. The methanol rail assembly is arranged on the intake manifold, and the gasoline rail assembly is arranged on the cylinder head. Alternatively, the methanol rail assembly is arranged on the cylinder head, and the gasoline rail assembly is arranged on the intake manifold, so that the engine can use methanol fuel or gasoline fuel for a long time, thereby reducing the cost of vehicle use and widening the vehicle use area.

[0014] 3. The methanol engine of the utility model uses a non-cooled EGR system, which reduces costs, emissions, and fuel consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the structure of the utility model Figure 3 ;

[0018] Among them: 1. Engine body; 2. Gasoline rail assembly; 3. Methanol rail assembly; 4. Intake manifold; 5. Cylinder head; 6. EGR valve; 7. Cylinder block; 201. Gasoline rail; 202. Gasoline injector; 301. Methanol rail; 302. Methanol injector. DETAILED DESCRIPTION

[0019] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0020] like Figure 1 to Figure 3 As shown, the utility model provides a methanol engine, including an engine body 1), a gasoline rail assembly 2, a methanol rail assembly 3, an intake manifold 4, a cylinder head 5, and an EGR valve 6;

[0021] The engine body 1 is arranged obliquely, and the angle between the center line of the cylinder barrel of the cylinder block 7 of the engine body 1 and the vertical direction is 55° or 63°;

[0022] The engine contains two fuel injection systems, which can use gasoline and methanol as fuel respectively;

[0023] The gasoline rail assembly 2 is connected to the gasoline tank of the vehicle to inject gasoline fuel into the combustion chamber of the engine body 1. The gasoline rail assembly 2 includes a gasoline rail 201 and four gasoline injectors 202. The four gasoline injectors 202 inject gasoline fuel into the first, second, third and fourth cylinders of the cylinder body 7 respectively. The gasoline rail assembly 2 is arranged on the intake manifold 4 or the cylinder head 5 through bolts and brackets.

[0024] The methanol rail assembly 3 is connected to the methanol fuel tank of the vehicle to inject methanol fuel into the combustion chamber of the engine body 1. The methanol rail assembly 3 includes a methanol rail 301 and four methanol injectors 302. The four methanol injectors 302 inject methanol fuel into the first, second, third and fourth cylinders of the cylinder body 7 respectively. The methanol rail assembly 3 is arranged on the intake manifold 4 or the cylinder head 5 through bolts and brackets.

[0025] The positions of the methanol rail assembly 3 and the gasoline rail assembly 2 can be interchanged. The methanol rail assembly 3 is arranged on the intake manifold 4, and the gasoline rail assembly 2 is arranged on the cylinder head 5. Alternatively, the methanol rail assembly 3 is arranged on the cylinder head 5, and the gasoline rail assembly 2 is arranged on the intake manifold 4. The installation diameter of the methanol injector 302 is the same as the installation diameter of the gasoline injector 202, and the diameters of the injector installation holes on the intake manifold 4 and the cylinder head 5 are the same.

[0026] The intake manifold 4 is a wave-shaped intake manifold;

[0027] The EGR valve 6 is disposed on the cylinder head 5 and is connected to the intake manifold 4 through a pipe.

[0028] The working principle is:

[0029] When the methanol rail assembly 3 is arranged on the cylinder head 5 and the gasoline rail assembly 2 is arranged on the intake manifold 4, the methanol rail assembly 3 is a common injection system and the gasoline rail assembly 2 is an auxiliary injection system. The gasoline rail assembly 2 is used for cold engine start-up or when the vehicle cannot be filled with methanol fuel, the gasoline is temporarily used for operation. When the engine water temperature is less than 20°C, the gasoline rail assembly 2 injects gasoline fuel into the combustion chamber of the engine body 1, and the engine runs with gasoline fuel. At this time, the methanol rail assembly 3 does not work; when the engine water temperature is greater than or equal to 20°C, the methanol rail assembly 3 injects methanol fuel into the combustion chamber of the engine body 1, and the engine runs with methanol fuel. At this time, the gasoline rail assembly 2 does not work.

[0030] When the gasoline rail assembly 2 is arranged on the cylinder head 5 and the methanol rail assembly 3 is arranged on the intake manifold 4, the gasoline rail assembly 2 is a common injection system, the methanol rail assembly 3 is an auxiliary injection system, and the gasoline rail assembly 2 is used for cold engine starting. This state is used for the vehicle to run in an area without methanol fuel for a long time, to run with gasoline fuel for a long time, and to run with methanol fuel occasionally. When running with methanol fuel, when the engine water temperature is less than 20°C, the gasoline rail assembly 2 injects gasoline fuel into the combustion chamber of the engine body 1, and the engine runs with gasoline fuel. At this time, the methanol rail assembly 3 does not work; when the engine water temperature is greater than or equal to 20°C, the methanol rail assembly 3 injects methanol fuel into the combustion chamber of the engine body 1, and the engine runs with methanol fuel. At this time, the gasoline rail assembly 2 does not work.

[0031] The EGR valve 6 is arranged on the cylinder head 5, and exhaust gas is extracted from the exhaust gas through the internal air passage of the cylinder head 5, connected to the intake manifold 4 through a pipe, and the exhaust gas is introduced into the combustion chamber to mix with methanol fuel or gasoline fuel and fresh air to participate in combustion.

[0032] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A methanol engine, characterized in that: The invention comprises an engine body (1), a gasoline rail assembly (2) and a methanol rail assembly (3); the engine body (1) is arranged tilted, the gasoline rail assembly (2) is connected to the gasoline tank of the whole vehicle and injects gasoline fuel into the combustion chamber of the engine body (1), and the methanol rail assembly (3) is connected to the methanol tank of the whole vehicle and injects methanol fuel into the combustion chamber of the engine body (1).

2. A methanol engine according to claim 1, characterized in that: The angle between the center line of the cylinder barrel of the cylinder body (7) of the engine body (1) and the vertical direction is 55° or 63°.

3. A methanol engine according to claim 1, characterized in that: The gasoline rail assembly (2) comprises a gasoline rail (201) and four gasoline injectors (202). The four gasoline injectors (202) respectively inject gasoline fuel into the first, second, third and fourth cylinders of the cylinder body (7). The gasoline rail assembly (2) is arranged on the intake manifold (4) or the cylinder head (5) by means of bolts and brackets.

4. A methanol engine according to claim 3, characterized in that: The methanol rail assembly (3) comprises a methanol rail (301) and four methanol fuel injectors (302). The four methanol fuel injectors (302) respectively inject methanol fuel into the first, second, third and fourth cylinders of the cylinder body (7). The methanol rail assembly (3) is arranged on the intake manifold (4) or the cylinder head (5) by means of bolts and brackets.

5. A methanol engine according to claim 4, characterized in that: The installation diameter of the methanol fuel injector (302) is the same as the installation diameter of the gasoline fuel injector (202), and the diameters of the fuel injector installation holes on the intake manifold (4) and the cylinder head (5) are the same.

6. A methanol engine according to claim 3 or 4, characterized in that: The intake manifold (4) is a wave-shaped intake manifold.

7. A methanol engine according to claim 1, characterized in that: The EGR valve (6) is arranged on the cylinder head (5) and is connected to the intake manifold (4) through a pipe.

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